PEROXIDE INITIATED GRAFTING OF ALKOXYSILANES FROM POLY(ISOBUTYLENE-CO-PARA-METHYLSTYRENE) UTILIZING A CO-ROTATING TWIN SCREW EXTRUDER

摘要

Reactive processing of various alkoxysilanes with poly(isobutylene-co-para-methylstyrene) copolymers in a co-rotating, intermeshing twin-screw extruder produced novel, curable, grafted elastomers with excellent barrier properties. One of these polymers is currently used as a coating in a commercial application. The effect of formulation, screw design, and processing conditions upon polymer properties, economics, and side reactions were studied. Also investigated was how grafting level and efficiency are influenced by a number of inhibitor additives.